BD FACScan flow cytometry analyser, used to sort cells by labelling them with up to three different fluorescent dyes detected by a single laser, made by Becton Dickinson and Company, New Jersey, United States, 1991. During the 1990s the FACScan was the industry-standard commercial cell analyser in research and clinical settings. This machine was used at MRC Mill Hill Laboratory within immunology, virology, and parasitology research and by yeast geneticists.